The title molecule, C12H10N2O3S, is nonplanar with an interplanar angle of 33.44 (7)° between the benzene and thiophene rings. In the crystal there exist only weak intermolecular C—H⋯O interactions, π–π interactions between the benzene rings [centroid–centroid distance = 3.7465 (14) Å] and X—Y⋯π interactions to the thiophene and benzene rings [N⋯centroid distances = 3.718 (3) and 3.355 (3) Å, respectively]. Intermolecular C—H⋯O interactions link the molecules into chains parallel to the a axis.
In the title molecule, C17H12INO, the dihedral angle between the naphthaldeyde plane and the 3-iodoaniline plane is20.07 (13)°. It exists in the solid state as an enol–imine tautomer with a strong intramolecular O—H⋯N hydrogen bond.
The title compound, C17H12BrNO, exists in an enol–imine form and the molecular structure features an intramolecular O—H⋯N hydrogen bond. The dihedral angle between the benzene ring and the naphthalene ring system is 17.27 (15)°.
In the title Schiff-base type compound, C18H13N3O5, the central furan ring makes dihedral angles of 12.80 (7) and 51.43 (4)° with the terminal benzene rings. The dihedral angle between the benzene rings is 45.43 (3)°. In the crystal, C—H⋯O hydrogen bonds link the molecules into layers parallel to (010). In addition, there are π–π stacking interactions within the layer [centroid–centroid distance = 3.584 (1) Å] and between the layers [centroid–centroid distance 3.751 (1) Å].
The title compound, C23H16N2OS, is not planar, the phenyl ring of the benzoyl group making a dihedral of 77.61 (7)° with the benzothiophene system ring. The benzothiophene system and the remaining phenyl ring make an angle of 12.71 (13)°. The conformation around the imine functions is E for the C=N bond towards the benzothiophene system and Z for the C=N bond towards the benzoyl group. The packing of the molecules shows C—H⋯π interactions. A weak intramolecular C—H⋯N bond also occurs.
In the title compound, C15H10FNO3, the dihedral angle between the isoindoline-1,3-dione and 3-fluoro-4-methylphenol groups is 86.88 (8)°. The isoindoline-1,3-dione fragment is almost planar, with an r.m.s. deviation of 0.0154 Å within the group. Intermolecular C—H⋯O hydrogen bonds generate C(6) chains running parallel to the  direction.
In the crystal structure of the title compound, C12H10N2O2S, the benzene and the 2-nitrothiophene rings make a dihedral angle of 7.47 (12)°. The dihedral angle between the nitro group and the attached ring is 1.9 (6)°.
The title Schiff base, C17H19IN2O, is not planar, displaying a dihedral angle of 34.9 (2)° between the two aromatic rings. The molecular conformation allows the formation of a strong intramolecular O—H⋯N hydrogen bond with graph-set motif S(6) between the hydroxy group and the imine N atom.
The title Schiff base, C19H24N2O3, exists in the crystal structure in the phenol–imine tautomeric form with an intramolecular O—H⋯N hydrogen bond. The planes of the aromatic rings form a dihedral angle of 36.8 (8)°. The crystal packing is characterized by C—H⋯O hydrogen bonds and π–π stacking interactions [centroid–centroid distance = 3.478 (4)Å].
In the title compound, C17H15NS, the benzothiophene residue and the substituted benzene ring are oriented at a dihedral angle of 61.99 (7)°. An intermolecular C—H⋯π interaction contributes to the stability of the crystal structure.
In the title conpound, C16H12N2O2S, the 1-benzothiophene residue and the substituted benzene ring are oriented at a dihedral angle of 53.36 (6)°. The molecular conformation features a short C—H⋯N contact. There are no significant intermolecular contacts.
In the title compound, C13H12N2O2S, the dihedral angle between the benzene and thiophene rings is 36.72 (8)°. An intermolecular C—H⋯π interaction contributes to the stability of the crystal structure.
In the title compound, C14H10F3NO2, the two benzene rings are oriented at a dihedral angle of 31.94 (14)°. An intramolecular O—H⋯N hydrogen bond helps to stabilize the molecular structure. In the crystal, intermolecular O—H⋯O hydrogen bonding links the molecules, forming chains running along the crystallographic a axis. The F atoms of the trifluoromethyl group are disordered over two positions with refined site occupancies of 0.488 (5) and 0.512 (5).